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Customer Reviews

Fluke BT520 Battery Analyzer

Model: BT520

Comes equipped with the BTL20 intelligent test probe set, this battery analyzer is designed to take measurements on stationary batteries of all types. Additionally, this tool covers a broad range of battery test functions ranging from DC voltage and resistance tests to full condition testing.

$4,299.99 USD

1 to 2 Weeks
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Fluke BT520 Battery Analyzer

Reduced testing complexity, combined with a simplified workflow and intuitive user interface.

The new Fluke 500 Series of Battery Analyzers is the ideal test tool for maintenance, troubleshooting and performance testing of individual stationary batteries and battery banks used in critical battery back-up applications.

Featuring an intuitive user interface, compact design and rugged construction. The BT500 Series ensures optimum performance, test results and reliability. These testers cover a broad range of battery test functions ranging from DC voltage and resistance tests, to full condition testing using and automated string function and the test probe integrated infrared temperature measurement system.

The BT500 Battery Analyzer series is designed for measurements on stationary batteries of all types.


  • Key measurements: Battery resistance, dc and ac voltage, dc and ac current, ripple voltage, frequency and battery temperature.
  • Sequence measurement mode: Automatic or manual sequence testing of battery strings with automatic measurement storage including voltage, resistance and temperature (with BTL21 intelligent test probe included with BT521).
  • Comprehensive logging: All measured values are automatically captured during testing and can be reviewed on the instrument before downloading for on-the-go analysis.
  • Optimized user interface: Quick, guided setup ensures you're capturing the right data every time, and the combined visual and audio feedback cues reduce the risk of measurement confusion.
  • Threshold comparison: Configure multiple reference values and thresholds for resistance and voltage. Comparison result feedback after each measurement via visual and verbal cues.
  • Ergonomic test leads: Rugged coaxial two pole kelvin test pins with remote SAVE button reduce test time and increase efficiency.
  • Test probe extenders: Long reach probes for double stacked cells (included with BT520 and BT521).
  • Intelligent test probe set (BT520 and BT521): Integrated LCD display, infrared temperature measurement (BT521 only), flashlight, verbal audio feedback and captures voltage readings and temperature logging automatically or via integrated save button.
  • Enhanced data analysis: Quickly compare trends, analyze results and create reports with included battery management software.
  • Easy reporting: Generate PDF report on the PC software with analysis graphics and data table or quick email format report with csv file on the mobile app.
  • Wireless communication: For data download and remote display while measuring. Browse and email measurement data via iOS app.
  • Battery life: 7.4 V 3000 mAh lithium-ion battery for more than eight hours continuous operation.
  • USB port: For fast data download to supplied data analysis and report management application software.
  • Highest safety rating in the industry: CAT III 600 V, 1000 V dc max. rated for safe measurements all around the battery power supply equipment.

What's included with the BT510:

Please note: what is included with each BT500 Battery Analyzer varies from model to model. Listed below are the included parts for the BT520.

  • Battery analyzer
  • 4-wire test pin (set)
  • BTL10 Basic Test Lead (set)
  • TL175 TwistGuard™ Test Leads with adapter
  • L300 Attachable LED Flashlight (x2)
  • BTL20 Intelligent Test Probe Set, with extender (no temperature sensor)
  • Paper battery tags
  • BP500 7.4 V 3000 mAh lithium-ion battery
  • BC500 18 V AC Charger
  • Standard mini-b USB cable (cable length:1 m)
  • Shoulder strap
  • Belt strap
  • Magnetic hanging strap
  • FlukeView® Battery Management (CD) containing USB driver and manuals in all languages
  • Soft carrying case
  • Spare fuses (x2)

Fluke BT520 Specifications

Battery Resistance/Strap Resistance
Range 3 mΩ
30 mΩ
300 mΩ
3000 mΩ
Resolution 0.001 mΩ
0.01 mΩ
0.1 mΩ
1 mΩ
Accuracy 1% + 8
0.8% + 6
Range 6 V
60 V
600 V
Resolution 0.001 V
0.01 V
0.1 V
Accuracy 0.09% + 5
V AC (45 to 500 Hz with 800 Hz filter)
Range 600 V
Resolution 0.1 V
Accuracy 2% + 10
Range 500 Hz
Resolution 0.1 Hz
Accuracy 0.5% + 8
AC Voltage Ripple (20 KHz Max)
Range 600 mV
6000 mV
Resolution 0.1 mV
1 mV
Accuracy 3% + 20
3% + 10
General Specifications
Meter Mode 999 records for each measurement position with time stamp
Sequence Mode Up to 100 profiles and 100 profile templates (each profile stores up to 450 batteries) with time stamp
Temperature Operating: 32 to 104°F (0 to 40°C)
Storage: -4 to 122°F (-20 to 50°C)
Battery charging: 32 to 104°F (0 to 40°C)
Operating Humidity Non-condensing (50 °F [10°C])
≤80% RH (at 50 to 86°F [10 to 30°C])
≤75 % RH (at 86 to 104°F [30 to 40°C])
Altitude Operating: Sea level to 2000 meters
Storage: Sea level to 12,000 meters
IP Rating IP40
Radio FCC Class A
Vibration Requirements MIL-PRF-28800F: Class 2
Drop Test Requirements 1 meter
Temperature Coefficients Add 0.1 x specified accuracy for each °C above 28°C or below 18°C
Safety Compliance 600 V CAT III
EMC IEC 61326
Protection Class 2 Pollution Degree II
Battery Compliance UN38.3
2G per IEC68-2-26, 25G, and 29
Screen Dimensions 3 x 2.2" (7.7 x 5.6 cm)
Interface USB mini
Dimensions 9 x 4 x 2" (22 x 10.3 x 5.8 cm)
Weight 1.9 lb (850 g)
Click here for complete specifications on the Fluke BT520

What's included with the Fluke BT520

  • Battery Analyzer
  • 4-Wire Test Pin Set
  • Basic Test Lead Set
  • TwistGuard™ Test Leads with Adapter
  • Intelligent Test Probe Set with Extender
  • Standard Mini-b USB Cable
  • 2 x Spare Fuses
  • Shoulder Strap
  • Belt Strap
  • Magnetic Hanging Strap
  • 100 x Paper Battery Tags
  • Soft Carrying Case
  • 18 V AC Charger
  • 7.4 V 3000 mAh Lithium-Ion Battery
  • Fluke Battery Management (CD) Containing USB Driver and Manuals in All Languages


Click on a category to view a selection of compatible accessories with the Fluke BT520 Battery Analyzer.

Fluke i410 AC/DC Current Clamp I410
The current clamp expands the functionality of digital multimeters and measures up to 400 amps for both AC and DC currents. The large clamp claw gives you access to difficult to reach areas.
$251.99 USD

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Fluke BC500 AC Power Charger BC500
Replacement or AC space charger for Fluke 500 Series Battery Analyzers. Provides power cord operation and charging for Fluke 500 Series Battery Analyzers.
$152.99 USD

was $169.99

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$125.99 USD

was $139.99

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Fluke BT500 Probe Tip BT500-PROBE-TIP
10 Count Replacement Probe Tips and covers.
$152.99 USD

was $169.99

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$386.99 USD

was $429.99

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Fluke BTL20 Test Probe Set with Extender BTL20
Test Probe Set with Extender. No Temperature Sensor.
$584.99 USD

was $649.99

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Fluke BTL21 Probe Set with Extender and Temp Sensor BTL21
Test Probe Set with Extender & Temperature Sensor.
$764.99 USD

was $849.99

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Customer Reviews for the Fluke BT520